Tsutomu Hasegawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ferromagneticpiezoelectric ceramic composition
- Patent number 4,184,971
- Issue date Jan 22, 1980
- TDK Electronic Co.
- Yoichi Tanaka
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Ferromagnetic piezoelectric ceramic composition
- Patent number 4,169,803
- Issue date Oct 2, 1979
- TDK Electronic Company
- Yoichi Tanaka
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES